View source for DRB Class 03.10

{{Infobox locomotive
| name             = DRB Class 03.10<br/>PKP class Pm3
| bgcolor          = A00
| color            = FFF
| image            = 03 1010 Delitzsch 30.08.08 (1).JPG
| alt              = 
| caption          = DR 03 1010
| powertype        = Steam
| designer         = 
| builder          = {{ubl|[[Borsig Lokomotiv Werke (AEG)|Borsig]] (22)|[[Krupp]] (18)|[[Krauss-Maffei]] (20)}}
| ordernumber      = 
| serialnumber     = 
| buildmodel       = 
| builddate        = 1939–1941
| totalproduction  = 60
| rebuilder        = 
| rebuilddate      = 
| numberrebuilt    = 
| website          = 
| whytetype        = {{whyte|4-6-2}}
| uicclass         = 2′C1′ h3
| DRGtype          = S 36.18
| driver           = Divided: inside cylinder on 1st,<br/>outside cylinders on 2nd
| gauge            = {{track gauge|sg}}
| leadingdiameter  = {{convert|1,000|mm|in|frac=8|abbr=on}}
| driverdiameter   = {{convert|2,000|mm|in|frac=8|abbr=on}}
| trailingdiameter = {{convert|1,250|mm|in|frac=8|abbr=on}}
| tenderdiameter   = {{convert|1,000|mm|in|frac=8|abbr=on}}
| minimumcurve     = 
| wheelbase        = 
|  wheelspacing    = {{ubl|{{convert|2200|mm|ftin|frac=8|abbr=on}} +|{{convert|1800|mm|ftin|frac=8|abbr=on}} +|{{convert|2250|mm|ftin|frac=8|abbr=on}} +|{{convert|2250|mm|ftin|frac=8|abbr=on}} +|{{convert|3500|mm|ftin|frac=8|abbr=on}}}}
|  engine total    = {{convert|12000|mm|ftin|frac=8|abbr=on}}
|  leading         = 
|  coupled         = <!-- British terminology -->
|  trailing        = 
|  tender total    = {{convert|5,700|mm|in|frac=8|abbr=on}}
|  tenderbogie     = {{convert|1,900|mm|in|frac=8|abbr=on}}
|  wheelbasewithtender = {{convert|20,225|mm|ftin|frac=8|abbr=on}}
| length           = 
|  over headstocks = {{convert|22,605|mm|ftin|frac=8|abbr=on}}
|  over buffers    = {{convert|23,905|mm|ftin|frac=8|abbr=on}}
| width            = 
| height           = {{convert|4550|mm|ftin|frac=8|abbr=on}}
| frametype        = 
| axleload         = {{convert|18.33|t|abbr=on}}
|  leadingbogie/pony= <!-- load on leading bogie or pony wheel -->
|  coupled all     = <!-- when the load on all coupled wheels are the same -->
|  coupled 1       = <!-- load on 1st coupled wheel -->
|  coupled 2       = <!-- load on 2nd coupled wheel -->
|  coupled 3       = <!-- etc. -->
|  trail bogie/pony= <!-- load on trailing bogie or pony wheel -->
|  tenderbogieload = <!-- load per tender bogie, use "Truck 1:<br/>Bogie 2:" if different -->
|  tenderaxle      = <!-- use "Axle 1:", etc with "<br/>" for line breaks -->
| weightondrivers  = {{convert|54.98|t|abbr=on}}
| emptyweight      = {{convert|93.8|t|abbr=on}}
| serviceweight    = {{convert|103.04|t|abbr=on}}
| locoweight       = 
| tenderweight     = 
| locotenderweight = 
| tendertype       = 2′2′&nbsp;T&nbsp;34&nbsp;St
| fueltype         = Coal
| fuelcap          = {{convert|10|t}}
| watercap         = {{convert|34|m3|impgal usgal|abbr=on}}
| tendercap        = 
| sandcap          = 
| fireboxtype      = <!-- Round-top, Belpaire, combustion chamber, etc. -->
|  firearea        = {{convert|3.9|m3|abbr=on}}
| boiler           = <!-- Watson Standard no. x, etc -->
|  boilertype      = <!-- Domeless, etc -->
|  pitch           = {{convert|3100|mm|ftin|frac=8|abbr=on}}
|  diameterinside  = 
|  lengthinside    = {{convert|6800|mm|ftin|frac=8|abbr=on}}
|  smalltubediameter= {{convert|70|mm|in|frac=8|abbr=on}}, 85 off
|  largetubediameter= {{convert|171|mm|in|frac=8|abbr=on}}, 20 off
| boilerpressure   = {{convert|16|bar|kg/cm2 psi|sigfig=3|abbr=on}}
| safetyvalvetype  = <!-- Salter spring balance, Ramsbottom, Pop, etc. -->
| feedwaterheater  = 
|  fireboxarea     = {{convert|15.9|m2|abbr=on}}
|  tubearea        = {{convert|117.88|m2|abbr=on}}
|  archarea        = 
|  fluearea        = {{convert|69.18|m2|abbr=on}}
|  tubesandflues   = 
| totalsurface     = {{convert|202.96|m2|abbr=on}}
| superheatertype  = 
|  superheaterarea = {{convert|72.22|m2|abbr=on}}
| cylindercount    = Three
| cylindersize     = {{convert|470|x|660|mm|in|frac=16|abbr=on}}
| cylinderpressure = 
| valvegear        = 
| valvetype        = 
| valvetravel      = 
| valvelap         = 
| valvelead        = 
| transmission     = 
| trainheating     = 
| locobrakes       = 
| locobrakeforce   = 
| trainbrakes      = 
| safety           = 
| coupling         = 
| maxspeed         = {{convert|140|km/h|abbr=on}}
| indicatedpower   = {{convert|1,790|PS|kW hp|abbr=on}}
| poweroutput      = 
| tractiveeffort   = 
| factorofadhesion = 
| operator         = 
| operatorclass    = 
| powerclass       = 
| numinclass       = 
| fleetnumbers     = 03&nbsp;1001–1022, 1043–1060, 1073–1092
| officialname     = 
| nicknames        = 
| axleloadclass    = 
| locale           = 
| deliverydate     = 
| firstrundate     = 
| lastrundate      = 
| retiredate       = {{ubl|DB: 1966|DR: 1981|PKP: 1968}}
| withdrawndate    = 
| preservedunits   = 
| restoredate      = 
| scrapdate        = 
| currentowner     = 
| disposition      = 
| notes            = 
}}
The German '''Class 03.10''' (''Baureihe 03.10'' or ''BR 03.10'') engines were standard [[steam locomotive]]s (''[[Einheitsdampflokomotive]]n'') belonging to the [[Deutsche Reichsbahn-Gesellschaft|Deutsche Reichsbahn]] and designed for hauling [[express train]]s.

== History ==
[[File:Pm 3-5 als Pm 3-3 Warszawa 06.04.05.jpg|thumb|left|Pm3-5 as Pm3-3 with a 32D3-3 tender]]
The DRG's Class 03.10 engines were an evolutionary development from the [[DRG Class 03|Class 03]] locomotives, comparable to those of [[DRG Class 01.10|Class 01.10]] which had evolved from [[DRG Class 01|Class 01]]. The first 03.10 was built in 1939 and 140 units were to be manufactured. As a result of the [[Second World War]] and the switching of production to 'war essential' goods, only 60 vehicles were completed. Originally supplied with the 2'2 T38St standard [[tender (locomotive)|tenders]], the 03.10 could later be encountered coupled to 2'2'T34 tenders. The locomotives were mainly produced by the firms of [[Borsig Lokomotiv Werke (AEG)|Borsig]], [[Krupp]] and [[Krauss-Maffei]], and were fully enclosed by streamlining plates. The vehicles were given the operating numbers 03 1001 – 1022, 03 1043–1060 and 03 1073 – 1092.

After the war, 47 locomotives remained in [[Germany]]; 26 were taken over by the [[Deutsche Bundesbahn]] and 21 by the [[Deutsche Reichsbahn (East Germany)|Deutsche Reichsbahn]] in [[East Germany]]. Ten other locomotives ended up with the Polish State Railways ([[Polskie Koleje Państwowe|PKP]]) as the [[PKP class Pm3|Pm3]]. Two engines (03 1091 and 1092) had to be retired as early as 1944 due to war damage. The fate of 03 1002 is unknown. Because the top speed on main lines had to be reduced due to route damage, the streamlined shells became uneconomical, not least because they made maintenance more difficult, and they were removed from all the engines except the DR's 03 1087. Almost all the DR and DB locomotives were rebuilt. Only 03 1047, 1097 and 1086 (DR) had been retired before the reconstruction programme.<ref>Dampflokomotiven deutscher Eisenbahnen Baureihe 01-39 {{ISBN|3-87094-081-6}}</ref>

== The East German DR ''Rekoloks'' ==
The locomotives' boilers' condition worsened due to the use of non-aging ''St47K'' steel (on 10 October 1958 the boiler of locomotive 03 1046 exploded due to degrading), so the Deutsche Reichsbahn had to replace them with newly designed boilers. In addition, several other components were overhauled to make the engines more economical. Thus the term ''[[Rekolok]]'' ('reconstructed locomotive') is entirely accurate. A total of 16 engines were rebuilt in 1959. In 1952, 03 1087 was converted to the ''Wendler'' brown coal dust firing system. Because this type of firing was unsuccessful for passenger train services, it was re-converted in 1959. 

From 1965 all the ''Rekoloks'' were converted to oil-firing except for 03 1057 and 1087. Until their retirement at the end of the 1970s the three-cylinder express engines were the spearhead of the DR's high-value express train services, covering up to {{cvt|22,000|km|mi|0}} per month. Number 03 1010 is a museum locomotive with the [[DB AG]], stationed in [[Halle (Saale)|Halle]] and frequently used in heritage services. It was re-converted to coal-firing. The non-operational, oil-fired 03 1090 is also preserved and is housed in the former [[locomotive depot]] (''Bahnbetriebswerk'' or ''Bw'') at [[Schwerin]].

<gallery>
 Image:Baureihe 03 10 seite.jpg|03 1010 from the side
 Image:Baureihe 03 10 Treibrad.jpg|Driving wheelset
 Image:Baureihe 03 10 Tender Innen.jpg|Interior of 03 1010's tender
 Image:Baureihe 03 10 Details Innen.jpg|Driver's cab on 03 1010
</gallery>

== The DB Rebuilds ==
{{Infobox locomotive
| name             = DB Class 03.10<br/>''Neubau-Ersatzkessel''
| bgcolor          = a00
| color            = fff
| axleload         = {{convert|18.9|t|abbr=on}}
| emptyweight      = {{convert|93.2|t|abbr=on}}
| serviceweight    = {{convert|104.2|t|abbr=on}}
| weightondrivers  = {{convert|56.8|t|abbr=on}}
|  lengthinside    = {{convert|5200|mm|ftin|frac=8|abbr=on}}
|  smalltubediameter= {{convert|54|mm|in|frac=8|abbr=on}}, 80 off
|  largetubediameter= {{convert|143|mm|in|frac=8|abbr=on}}, 43 off
| firearea         = {{convert|3.87|m2|abbr=on}}
| totalsurface     = {{convert|177.54|m2|abbr=on}}
|  tubearea        = {{convert|64.04|m2|abbr=on}}
|  archarea        = 
|  fluearea        = {{convert|92.28|m2|abbr=on}}
|  tubesandflues   = 
|  fireboxarea     = {{convert|21.22|m2|abbr=on}}
| superheatertype  = 
|  superheaterarea = {{convert|72.22|m2|abbr=on}}
| indicatedpower   = {{convert|1870|PS|kW hp|abbr=on}}
}}
In 1949 and 1950, the 26 Class 03.10 locomotives remaining with the Deutsche Bundesbahn were refurbished by [[Henschel]] in [[Kassel]]. The streamlined shells on all the locomotives were removed, mainly due to their poor condition. Externally, these engines can still be distinguished from the Class 03 by their still-recognisable [[steam dome]], their cut-down [[smokebox]] door, the flat ''Erhebung'' of the [[superheater]] regulator, the air reservoirs, the missing front skirt, and the shape of the driver's cab and tender.
The locomotives were stationed in [[Dortmund]], [[Ludwigshafen]] and [[Offenburg]] after their refurbishment. The three engines stabled at the locomotive depot or ''Bw'' Dortmund, numbers 03 1014, 03 1022 and 03 1043, were given a special steel blue livery in June 1950 for their boilers, cabs, and cylinder blocks. The smokebox and chimney remained painted black.

In 1952, the feedwater preheater was moved back to the area of the chimney on most of the locomotives and a circular smokebox door fitted.

At the general inspection in 1954, 03 1014, 03 1022 and 03 1043 lost their steel blue livery again.

Because major signs of aging appeared on the boilers, the firm of [[Krupp]] was given the task of replacing them with welded boilers which had a combustion chamber. In addition the locomotives were given newly designed tenders with covers and supply equipment. Both were installed in the repair shop (''Ausbesserungswerk'' or ''AW'') in [[Braunschweig|Brunswick]] between 1957 and 1961. In autumn 1958, all 26 engines were rehomed to ''Bw'' [[Hagen]]-Eckesey, after some had previously been based in [[Hamburg-Altona]] and [[Paderborn]]. These were numbers 03 1001, 1004, 1008, 1009, 1011–1014, 1016, 1017, 1021, 1022, 1043, 1045, 1049–1051, 1054–1056, 1060, 1073, 1076, 1081, 1082 and 1084. Between November 1965 and September 1966, all Class 03.10 locomotives were withdrawn, retired and scrapped.

== Surviving locomotives ==
The former no. 03 1010 is a museum locomotive retained as part of the [[Deutsche Bahn|DB]] fleet. It is homed in the former [[Bahnbetriebswerk|railway depot]] of Halle P ([[DB Museum]], Halle (Saale)),  maintained by the Railway Social Work Foundation (BSW) Group, ''Traditionsgemeinschaft Bw Halle P BSW'', and supported financially by the Society for the Preservation of ''Schnellzugdampflok 03 1010'' Following its main inspection in 2011 by the [[Meiningen Steam Locomotive Works]], they use it to haul railway specials throughout Germany.<ref>eisenbahn-magazin 1/2012, p. 19</ref>

The non-operational, oil-fired no. 03 1090 has also been preserved as a museum locomotive. It, too, is owned by DB. It is on loan to the Mecklenburg Railway and Technology Museum, located in the former [[Schwerin Hauptbahnhof|shed at Schwerin Central Station]].

The streamlined 03 1015 is today owned by the [[Polish State Railways|PKP]] and is on display as a non-operational exhibit in the [[Warsaw Railway Museum]].

==See also==
* [[List of DRG locomotives and railbuses]]
* [[List of preserved steam locomotives in Germany]]

== References ==
{{Reflist}}
*{{Hütter-01bis45|pages=85–89}}
*{{Weisbrod-EFA1.1|pages=46–53}}

== External links ==
* [https://web.archive.org/web/20121014020720/http://www.uqp.de/kopka/europa/deutsch/br0310.htm Technical data] {{in lang|de}}

{{Commons category|DRG Class 03.10|Baureihe 03-10}}

{{DRG locomotives}}

[[Category:Steam locomotives of Germany|03.10]]
[[Category:4-6-2 locomotives]]
[[Category:Deutsche Reichsbahn-Gesellschaft locomotives|03.10]]
[[Category:Borsig locomotives]]
[[Category:Krupp locomotives]]
[[Category:Krauss-Maffei locomotives]]
[[Category:Railway locomotives introduced in 1939]]
[[Category:Streamlined steam locomotives]]
[[Category:Standard-gauge locomotives of Germany]]
[[Category:2′C1′ h3 locomotives]]
[[Category:Passenger locomotives]]